zenith instrument

常見例句

The low-latitude meridian circle is requested to determine the transit time and the apparent zenith distance simultaneously when a star is passing across the meridian of the instrument;
為了滿足低緯子午環(huán)絕對測定方法的要求，即在子午方向同時測定天體中天時刻和天頂距；
This instrument has the ability to measure polarized reflectance and bi-directional reflectance of targets at various viewing zenith angles, light incidence zenith angles and azimuth angles.
本研究利用多角度光度計實(shí)測了玉米單葉的偏振反射比與二向反射比數(shù)據(jù)。